Charge Limiter
Set a hard maximum — 80% is the sweet spot. Your laptop stops charging the moment it hits the limit. Studies show batteries maintained at 80% retain up to 40% more capacity after two years.
macOS · Linux · Windows
Your laptop battery
deserves better
Lithium extends battery lifespan by up to 40% with intelligent charge limiting, real-time health monitoring, and automated care — running quietly in the background.
- macOS · Linux · Windows
- No Root or Admin Needed
- Runs at Login, Silently
- Open Source
- Hardware Capability Check
Free
Everything you need
Everything you need
to protect your battery
The core feature set is free, forever. No account required.
Live Battery Stats
Real hardware readings — temperature, cycle count, max capacity, power draw. Not the OS's adjusted estimates.
Manual Discharge
Run on battery even while plugged in. Bring an overcharged battery back to a healthier level with one tap.
Live Status Icon
Glanceable status — charging, discharging, limit reached, heat warning — visible in your menu bar or system tray at all times.
Pro
Advanced automation
Advanced automation
for serious users
Set it once. Lithium handles the rest while you work.
Heat Protection
Pauses charging automatically when your battery exceeds a temperature threshold. Protects chemistry under load or in warm environments.
Sailing Mode
Define a charge floor. Battery only recharges when it drops below the floor — eliminating micro-charging wear. Example: limit 80%, floor 75%.
Auto Discharge
Automatically begins discharge whenever the battery creeps above the limit, no manual intervention required.
Calibration Mode
Full automated charge/discharge cycle to recalibrate your battery management system. Recommended every 3–6 weeks for maximum accuracy.
Smart Schedules
Time-based automation for any battery action. Charge to 100% before Monday meetings. Calibrate every Sunday night. Your rules, your schedule.
Automation Integration
Full automation support — Apple Shortcuts on macOS, scripting hooks on Linux and Windows. Get stats, set limits, trigger calibration, top up programmatically.
Power Flow Diagram
Animated real-time Sankey diagram showing exactly where power is going — charger to battery, battery to system, or both simultaneously.
Top Up
One-tap override to charge to 100% before a flight or long day away from power. Automatically returns to your limit when unplugged.
Up in 30 seconds
No configuration wizards. No system extensions to approve.
-
Download & install
Grab the installer for your platform — .dmg for macOS, .deb or .AppImage for Linux, .msi or .exe for Windows. Lithium checks hardware capabilities on first launch.
-
Set your limit
Click the tray icon, drag the slider to 80%, and you're done. Lithium writes the limit directly to your battery's hardware controller.
-
Let it run
Lithium launches at login and runs silently in the background. No interruptions, no clutter. Just a healthier battery, every day.
Simple pricing
Start free. Upgrade when you need more.
Free
$0
Forever free. No account required.
- Charge limiter (20–100%)
- Live battery stats
- Manual discharge
- Status icon & percentage
- Launch at login
Best Value
Pro Lifetime
$19.99
once
3 devices · Pay once, own forever
- Everything in Free
- Heat protection
- Sailing mode
- Auto discharge
- Calibration mode
- Smart schedules
- Automation integration
- Power flow diagram
- Top Up override
- All future updates
- No recurring fees
All purchases include a 7-day refund. License keys delivered instantly to your email.
Frequently asked questions
- Lithium runs on macOS 14 Sonoma or later (Apple Silicon and Intel), Linux (Ubuntu 22.04+, Fedora 38+, Arch, kernel 5.10+), and Windows 10 build 19041+ and Windows 11.
- Lithium probes your hardware on first launch. Charge limiting is supported on all MacBooks, and on Linux/Windows laptops that expose the necessary kernel interfaces — ThinkPad, ASUS, Framework, and most modern laptops on Linux; Lenovo ThinkPad and ASUS on Windows. If your hardware doesn't support it, the app switches to read-only mode showing battery stats, and you are never charged for features you can't use.
- Lithium-ion batteries experience the most chemical stress at high states of charge. Batteries kept at 80% retain 20–40% more capacity over two years compared to batteries regularly charged to 100%, according to multiple independent battery research studies.
- Yes. Built-in options like Apple's Optimized Charging or Windows battery saver are black boxes that still charge to 100%. Lithium sets a hard, configurable limit at any percentage you choose and gives you full visibility into what your battery is doing at all times — across every platform.
- One license covers up to 3 devices across any mix of macOS, Linux, and Windows. Perfect for a personal laptop, work machine, and a home desktop.
- No persistent elevated access is required. On macOS, Lithium uses IOKit with no SIP changes. On Linux, it writes to sysfs — a one-time permission grant via pkexec if needed. On Windows, it uses standard WMI queries that run as a normal user.
Start protecting your battery today
Free to download. Takes 30 seconds to set up. Keeps paying off for years.
Download Lithium — Free